#include <GLTFWriter.h>

Inheritance diagram for ANSYS::Nexus::GLTFWriter::Attribute:

Public Types
enum	AttributeType { AT_INT = 5124 , AT_FLOAT = 5126 , AT_FLOAT_VEC2 = 35664 , AT_FLOAT_VEC3 = 35665 , AT_FLOAT_VEC4 = 35666 , AT_FLOAT_MAT4 = 35676 }

Public Member Functions
virtual bool	SetMinMax (AttributeType type, const int mn, const int mx)=0

virtual bool	SetMinMax (AttributeType type, const float mn, const float mx)=0

virtual void	SetLogarithmic (bool log)=0

Static Public Member Functions
static Attribute *	Create (GLTF gltf, const char name, AttributeType type, unsigned int count, const int data, Buffer buffer=0)

static Attribute *	Create (GLTF gltf, const char name, AttributeType type, unsigned int count, const float data, Buffer buffer=0)

static Attribute *	CreatePosition (GLTF gltf, unsigned int count, const float data, Buffer *buffer=0)

static Attribute *	CreateColor (GLTF gltf, AttributeType type, unsigned int count, const float data, Buffer *buffer=0)

static Attribute *	CreatePointSize (GLTF gltf, unsigned int count, const float data, Buffer *buffer=0)

static Attribute *	CreateDisplacementScale (GLTF gltf, unsigned int count, const float data, Buffer *buffer=0)

static Attribute *	CreateNormal (GLTF gltf, unsigned int count, const float data, Buffer *buffer=0)

static Attribute *	CreateTextureCoord (GLTF gltf, unsigned int num, unsigned int count, const float data, Buffer *buffer=0)

Detailed Description

There must be an attributes that defines the vertices to use for the element indices. Other attributes defining colors, normals, texture coordinates, etc., may be defined.

Attributes are part of the primitive and are eventually passed to the vertex shader. All attributes of the vertex shader must have a corresponding attribute defined in the primitive.

Examples: Test002.cpp, Test005.cpp, Test006.cpp, Test008.cpp, Test009.cpp, Test010.cpp, Test013.cpp, and Test014.cpp.

Definition at line 31 of file GLTFAttribute.h.

Member Enumeration Documentation

◆ AttributeType

enum ANSYS::Nexus::GLTFWriter::Attribute::AttributeType

Type of attribute.

Enumerator
AT_INT	4 byte integer
AT_FLOAT	4 byte float
AT_FLOAT_VEC2	2 AT_FLOATs
AT_FLOAT_VEC3	3 AT_FLOATs
AT_FLOAT_VEC4	4 AT_FLOATs
AT_FLOAT_MAT4	4x4 (16) AT_FLOATs

Definition at line 35 of file GLTFAttribute.h.

Constructor & Destructor Documentation

◆ ~Attribute()

virtual ANSYS::Nexus::GLTFWriter::Attribute::~Attribute ( )

inlineprotectedvirtual

Definition at line 51 of file GLTFAttribute.h.

Member Function Documentation

◆ Create() [1/2]

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::Create	(	GLTF *	gltf,
		const char *	name,
		AttributeType	type,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of the given type and name. There are several names that are reserved for special use:

POSITION - vertices of element index, this attribute must be defined
TEXCOORD0 - variable value at element index

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	name	Name of attribute.
[in]	type	Attribute::AttributeType defining type of attribute.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ Create() [2/2]

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::Create	(	GLTF *	gltf,
		const char *	name,
		AttributeType	type,
		unsigned int	count,
		const int *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of the given type and name. There are several names that are reserved for special use:

POSITION - vertices of element index, this attribute must be defined
TEXCOORD0 - variable value at element index

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	name	Name of attribute.
[in]	type	Attribute::AttributeType defining type of attribute.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ CreateColor()

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::CreateColor	(	GLTF *	gltf,
		AttributeType	type,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of name "COLOR". The "COLOR" attribute is usually optional.

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	type	Attribute::AttributeType defining type of attribute.
[in]	count	Number of attributes.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ CreateDisplacementScale()

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::CreateDisplacementScale	(	GLTF *	gltf,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of type AT_FLOAT_VEC4 and name "DISPLACEMENTSCALE". The "DISPLACEMENTSCALE" attribute is usually optional. It specifies a translation XYZ and a uniform scale S as a four float tuple XYZS

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ CreateNormal()

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::CreateNormal	(	GLTF *	gltf,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of type AT_FLOAT_VEC3 and name "NORMAL". The normal data must be normalized. The "NORMAL" attribute is usually optional. It is required for lighting calculations and spherical texture coordinate mapping.

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ CreatePointSize()

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::CreatePointSize	(	GLTF *	gltf,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of type AT_FLOAT and name "POINTSIZE". The "POINTSIZE" attribute is usually optional.

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ CreatePosition()

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::CreatePosition	(	GLTF *	gltf,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of type AT_FLOAT_VEC3 and name "POSITION". Every primitive must have an attribute with the name "POSITION". The GLTF Viewer uses the "POSITION" to perform hit detection and probing.

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ CreateTextureCoord()

static Attribute * ANSYS::Nexus::GLTFWriter::Attribute::CreateTextureCoord	(	GLTF *	gltf,
		unsigned int	num,
		unsigned int	count,
		const float *	data,
		Buffer *	buffer = `0`
	)

static

Creates an attribute of type AT_FLOAT_VEC and name "TEXCOORDnum". This creates a texture coordinate of type AT_FLOAT. Use Create to create texture coordinates into 2D textures. Texture coordinates are optional, but generally required for texture mapped materials. If the primitive has a "TEXCOORD0", the texture coordinate must be a 1D texture coordinate, as in the value of results variable. The GLTF Viewer will use this texture coordinate to perform probing. The value at the probe point will be the value of the texture coordinate.

Returns: Attribute object. Do not delete this pointer.

Parameters

[in]	gltf	GLTF object.
[in]	num	Texture coordinate number.
[in]	count	Number of attributes. Number is relative to sizeof type.
[in]	data	Data for attribute. data type is base type of attribute.
[in]	buffer	Optional, Buffer into which to write attribute data. Data is appended to buffer.

◆ SetLogarithmic()

virtual void ANSYS::Nexus::GLTFWriter::Attribute::SetLogarithmic ( bool log )

pure virtual

Sets a flag indicating whether to log the data values. Only used for results type data.

Parameters

[in] log log flag.

Examples: Test013.cpp.

◆ SetMinMax() [1/2]

virtual bool ANSYS::Nexus::GLTFWriter::Attribute::SetMinMax	(	AttributeType	type,
		const float *	mn,
		const float *	mx
	)

pure virtual

Sets the min and max value of an attribute. The min and max value is required for all attributes. If SetMinMax is not called, the min and max values are automatically calculated from the attribute. Under some situations this is not the desired value. When programs are auto-generated, and the primitive has a "TEXCOORD0", the generated program will use the min/max of the texture coordinate to normalize the texture coordinate value for use as a texture lookup value.

Returns: Status of SetMinMax.

Parameters

[in]	type	Attribute::AttributeType defining type of attribute.
[in]	mn	Minimum value of attribute.
[in]	mx	Maximum value of attribute.

◆ SetMinMax() [2/2]

virtual bool ANSYS::Nexus::GLTFWriter::Attribute::SetMinMax	(	AttributeType	type,
		const int *	mn,
		const int *	mx
	)

pure virtual

Sets the min and max value of an attribute. The min and max value is required for all attributes. If SetMinMax is not called, the min and max values are automatically calculated from the attribute. Under some situations this is not the desired value. When programs are auto-generated, and the primitive has a "TEXCOORD0", the generated program will use the min/max of the texture coordinate to normalize the texture coordinate value for use as a texture lookup value.

Returns: Status of SetMinMax.

Parameters

[in]	type	Attribute::AttributeType defining type of attribute.
[in]	mn	Minimum value of attribute.
[in]	mx	Maximum value of attribute.

Examples: Test009.cpp, and Test014.cpp.

The documentation for this class was generated from the following file:

D:/Product-src/webgl_viewer/gltfwriterlib/include/GLTFAttribute.h

Post-processing tools 2024 R1

ANSYS::Nexus::GLTFWriter::Attribute Class Reference

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ AttributeType

Constructor & Destructor Documentation

◆ ~Attribute()

Member Function Documentation

◆ Create() [1/2]

◆ Create() [2/2]

◆ CreateColor()

◆ CreateDisplacementScale()

◆ CreateNormal()

◆ CreatePointSize()

◆ CreatePosition()

◆ CreateTextureCoord()

◆ SetLogarithmic()

◆ SetMinMax() [1/2]

◆ SetMinMax() [2/2]

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